<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .container {
            height: 500px;
            width: 500px;
        }

        .left {
            float: left;
            width: 50%;
            height: 100%;
        }

        .top {
            height: 50%;
            width: 100%;
            background-color: pink;
        }

        .bottom {
            height: 50%;
            width: 100%;
            background-color: green;
        }


        .right {
            float: left;
            width: 50%;
            background-color: burlywood;
            height: 100%;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="left">
        <div class="top"></div>
        <div class="bottom"></div>
    </div>
    <div class="right"></div>
</div>
</body>
</html>